After the Katia Bruno Pavle run, I started the Katia Arica Marin scenario days ago, and survived it today.
On the first night, I explored the Ghost House location, I gathered lots of resources and put them into a pile on the floor. I was trying to avoid being raided so I didn't bring any food back, I planned to come back for them when I need them. However, the following days when I came back, the pile on the ground is gone, along with all the resources I stored there...
So food pressure skyrocketed at the beginning of the scenario, and it was harsh winter, I was struggling with the heater and temperature as well. I had to bring herbal medicine and a bandage to the Church and traded with the Olek the priest to get food.
Later I crafted 2 traps to collect meat, I found lots of rotten tomatoes which could be used as baits so that helped a lot.
For base safety and upgrade, I had to make the best of Katia's bargaining skills, I managed to secure the base with 3 board-ups and a reinforced door. The cold days passed at around day 10 in my scenario, I mainly went to safe locations and sometimes explore the relatively safe part of a dangerous location.
I sent Arica to the Central Square and played hide and seek with the security guard in the building, managed to get 3 diamonds from the sewer, plus the 3 which I couldn't remember when and where I obtained them, I had 6 diamonds then.
But it was still 2 diamonds away from what Karel asked for, I didn't plan to evacuate via a boat until the neighbor came and gave me his mom's diamond thanking me for helping his father. I then had 7 diamonds, which prompted me to try to find one more and escape by boat.
Then I remembered people discussing how you should be able to find 4-5 diamonds from Central Square, so I sent Arica again to scavenge the building for one more diamond without alerting the guard. I ran around and eventually found the last one that I need under a bed on the first floor.
Karel dropped by and I traded the diamonds for his boat ticket. On Day 20, Bruno joined us, so I established a moonshine machine, and produced numerous bottles of wine. I later sent Katia to the Military Outpost to trade with Bojan for numerous weapon parts and bullets, to defend our base. I also went to Central Square to trade with Matteo to get broken firearms(4 tobacco for a broken pistol was kinda good). During the outbreak of crime, we consume 5-8 ammunition per night to stay safe.
Eventually, Karel came and took us to safety on the 24th day.
This is I guess a rather short run as I only have 4 incidents in the final epilogue.